Shuttle-operating mechanism for sewing-machines.



E. ERICKSON.

SHUTTLE OPERATING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED JULY 11, 1914.

1,149,350. Patented Aug. 10, 1915.

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SHUTTLE OPERATING MECHANISM FOR SEWING MACHINES.

, APPLICATION FILED JULY 17, I9I4.

1,149,350. Patented Aug. 10,1915.

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EdwardErzHason,

E. ERICKSON. SHUTTLE OPERATING MECHAAHSM FOR SEWING MACHINES.

APPLICATIQN FILED JULY 17, 1914. I

Patented Aug. 10, 1915.

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SHUTTLE OPERATING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED JULY 11. I9I4.

1,149,350. Patented Aug. 10, 1915.

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EDWARD ERICKSON, 'oF YNN, MASSACHUSETTS, ASSIG'Non. To VICTOR SHOE MACHINERY 00., or BOSTON, MASSACHUSETTS, A CORPORATION OF MASSA- CI-IUSETTS.

SHUTTLE-OPERATING MECHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Aug. 10, 1915.

Original application filed December 28, 1912, SerialNo. 739,056. Divided and this application filed July 17, 1914. Serial No. 852,099.

To all whom it burg concern Be it known that I, EDWARD ERICKSON, a subject of the King of Sweden, and a resident of Lynn, in the county of Essex and State of lvlassachusetts, have invented oeran improved mechanism for operating theshuttle in a machine such as 1s shownlnan other application of mine filed December 28,

1912, Ser. No. 739,056, of which this appli cation is 'a division.

The invention consists in certain novel features of construction and arrangement of parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a front elevation of the machine complete. Fig. 2 represents aleft end elevation of the same. Fig. 3 representsa vertical section of the same, looking toward the left end. Fig. 4 represents a planviewof the machine. Fig. 5 represents a detail elevation of the Shuttle and its support. Fig. 6 represents a section on line 66 of Fig. 5. Fig. 7 represents a View similar to Fig. 6, but showing the bobbin support turned outwardly. Fig. 8 represents a section on line 88 of Fig. 5 on an enlarged scale, and Fig. 9 represents. a section on line 99 of Fig. '8,- andalso on line 9 9 of Fig. 5, but on a larger scale than Fig. 5.

Similar reference characters indicatethe same or similar parts in all of the views.

The base 30 of the machine is provided with two uprights or standards 31, 32. The main shaft 34 is supported in a bearing 35 in the standard 31 and in a bearing 36 carried by a bracket 37 which is bolted to the side of the standard 32. Said main Shaft has a driving pulley 38 at one end and at its other end is provided with a spiral gear 39 meshing with a pinion 40 secured to a shaft 41 mounted in a bracket 42 supported by the top of the standard 31. The gear 39 and pinion 40 are as 3 to l.

The opposite ends of the shaft 41 are provided with cranks 43, 44, substantially at an angle of 90 to each other. A shaft 45 also mounted in the bracket 42 is providedwith cranks 46, 47 substantially at an angle of 90 to each other. A pitman 48 connects the cranks 43 and 46, and a pitm'an 49 connects the cranks 44 and 47. The pitman 49 has an extension or finger 50, the extreme tip of which forms or carries a lateral pin 51 which enters a recess 52 in the shuttle 53 (Figs. 2 and 3). The connections just described, including the parallel links 48, 49, impart a smooth uniform motion to the shuttle to rotate the latter three times to each rotation of the main shaft.

Referring especially to Figs. 2, 5, 6, and 7, it will be seen that the shuttle 53 is provided with a rib 54 running in a groove formediin the two-part bearing bracket 55, 56, these two parts of the bearing bracket being formed to present a circular support for the shuttle, one side of the support being open of course to permit the loop of needle thread to be engaged by the hook of the shuttle, carried around the shuttle and removed again therefrom by the takeup. As shown in Figs. 4 and 5, a screw 57 connects the two parts 55, 56 of the shuttle supporting bracket together, attaching bolts 58 securing the two parts of the bearingbracket to the inner face of the standard 31. As best Shown in Fig. 4, all of the parts so far de scribed are arranged and mounted to present the shuttle in a plane tangential to the'plane of operation of the needle and awl.

The bobbin59 (Figs. 5', 6, and 7) is rotatably supported upon a pin 60 projecting from an arm 61 pivoted at 62 to the shuttle,

- said arm 61 having a heel or lateral projection 63 by means of which, as presently described, the bobbin and its Support may be locked in the position shown in Fig. 6. A Spring 64 secured at one end to the shuttle supporting bracket bears at its other end against the bobbin to hold the bobbin on the pin 60 and also to provide tension to prevent too free unwinding motion of the bobbin. The heel 63 is provided with a pin 65 having a flat side and a round side, as shown I against the end of the latch bolt 66 by any in Figs. 8 and 9, said pin being. adapted to enter the recess 67 of the latch bolt 66, which is mounted in the shuttle body, a

in the position shown in Fig. 9, and consequently lock the bobbin arm 61 in the position shown in Fig. 6. The engagement of the keeper 68 with the pin 65 is preserved by a spring 69 confined between the inner end of the latch bolt 66 and the plug 70 threaded into the inner end of the aperture for bolt 66. Whenever it is desired to remove the bobbin for re-windingor to substitute another bobbin for it, pressure suitable implement disengages the keeper 68 from the pin 65 so that the operator, by

pushing with one finger against the side of the bobbin which sustains the pressure of spring 64:, may swing the bobbin-and its support to the position shown in Fig. 7 so that the obbin can easily be removed from the pin 60. By then simply swinging the support 61 from the position shown in Fig. 7 back to the position shown in Fig. 6, the round side of the pin 65, when it contacts with the keeper 68,]acts as a cam to displace the keeper 68 to permit the pin 65 to pass it, after which the spring 69 causes the latch bolt 66 to return to the position shown in Fig. 9.

The needle 151 has its carrier 152 (Fig. 3)

pivotally mounted on the fixed pin 153.

The carrier 152 has a rearwardly projecting arm 154: connected by a link 155 with an arm 156-which is fiXedlv but adjustably-secured to one end of a rock shaft 157 (Figs. 2 and 3) from which movement is imparted to said needle to cause it to enter the work after being pierced by the awl17 1.

As the mechanism for operating the needle and awl form no part of the present invention, these mechanisms are not herein described. These operating mechanisms are fully described in the application 739,056, to

which reference may be made for a more complete description.

The machine is also provided with suit- I able work feeding devices by which the work I may be fed by the awl, but it is believed no" description thereof is required in'view of the fact that thisomechanism forms no part of the present invention.

, The looper 201, the loop spreader 216, the

needle guide-225', and the othe'rinstrumenfor operating the shuttle is very smooth running and avoids all dead-centers, while; 1 it has the further advantage of being simple in construction and operation.

It is believed that the operation and'many advantages of the invention will be fully understood fromthe foregoing description; Having thus described my invention, I

claim:

' 1. In a sewingmachine, a'stitch forming mechanlsm lncludlng a needle, a rotatably,

mounted shuttle, a pair of parallel shafts, each having two cranks at anangleto leach other, means for driving one of said shafts,

mounted= shuttle, a pair-ofparallel shafts, each having two cranks at an angleto each;

other, means for driving one of "said shafts, 1f.

parallel connecting rods between said cranks,

one of. said rods having an extension engagmg a' shuttle to rotate it, andmeans' for operating said cranks at a speed to rotate theshuttle three times to eachoperation'of the needle of the'stitch formingmech'anism.

3. In a'sewing machine, a stitch forming mechanism including a needle, a rotatably mounted shuttle having a recess, a pair of parallel shafts, each having twocranks at an angle to each other, means for driving one of said shafts, and parallel connecting rods between said cranks, one of said rods being longer than the other and having a lateral 1 projection entering the recess of the shuttle.

Signed by me at Boston, Mass, this18th day of June, 1914.

EDWARD ERICKSON. \Vitnesses: I I

EDWARD F. ALLEN, 1 VV'ALTER E. LOMBARD.

Copies of this patent may be obtained for five cents each,byaddressi g zthefflcommissioner 012mm,

Wasliii1gton,1). C33, I 

